Ferriss, T., & McLarty, Z. (2010). The 4-hour body: An uncommon guide to rapid fat-loss, incredible sex, and becoming superhuman (Abridged.). Random House Audio.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Ferriss, Timothy, و Zach McLarty. The 4-hour Body: An Uncommon Guide to Rapid Fat-loss, Incredible Sex, and Becoming Superhuman. Abridged. New York: Random House Audio, 2010.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)Ferriss, Timothy, و Zach McLarty. The 4-hour Body: An Uncommon Guide to Rapid Fat-loss, Incredible Sex, and Becoming Superhuman. Abridged. Random House Audio, 2010.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.